There's not *actually* anything particularly weird there, it's just a result of the fact that CSS allows any non-ASCII character to form an ident token (along with ASCII alphanums, dashes, and underscores), which class selectors, property names, and keywords are all made from. So "ಠ_ಠ" is an ident, "--（╯°□°）╯" is an ident (if you're careful to use ideographic parentheses; it won't work with ASCII parens), and then ︵┻━┻ and ┬──┬ are idents.

Probably the odder part is that it uses a custom property, whose only constraint is that it has to be an ident that starts with two dashes. That's what lets the whole thing look so... odd in CSS.